Here is some information about the Anker 541 USB-C Hub to help to have a preliminary knowledge of it.

Specification

iMac Compatibility:

Designed to work with both old and new Thunderbolt 3 iMacs to make ports much easier to access. Not compatible with iMacs with Thunderbolt 2 ports and Apple Studio Display.

Installation: 

If you have any other questions, don't hesitate to contact us for help.